[79fj40moneypit]

Sounds iffy, I dont really want to spend a lot of time and cash and have my paint peel or blister, sounds like you could be real careful and still have problems.
Although I talked to a guy at Aqua Blast today and he said that he blasts with Arm and Hammer blasting soda he says it has a a chemical in it that leaves the soda neutral? after he is done blasting he power washes the metal drys it sprays it with metal etch then washes it with soap and water. Lot of steps to get the powder off.